Abstract
As a high temperature protective layer, platinum-iridium alloys were electroplated on the nickel-base single crystal superalloy TMS-82+ from amidosulfuric acid solutions by the direct current method. It was found that Ir content in the films was always lower than the ratio of concentration ([Ir 3+]/([PtCl62-] + [Ir3+])) in the electrolytes, indicating that preferential deposition of Pt occurred in this study. The asdeposited Pt-Ir films formed an fee single phase structure with a granular surface. When Ir content exceeded 3 at%, Pt-Ir films exhibited the 〈111〉 preferred growth orientation. It was also found that pre-deposition of Ni and Pt promoted the deposition rate and changed composition of overlaying Pt-Ir films.
| Original language | English |
|---|---|
| Pages (from-to) | 2176-2179 |
| Number of pages | 4 |
| Journal | Materials Transactions |
| Volume | 46 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 2005 Oct 1 |
| Externally published | Yes |
Keywords
- Direct current method
- Electroplating
- Ni-base superalloy
- Platinum-iridium films
- Pre-deposition
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
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Cite this
Wu, Y., Suzuki, A., Murakami, H., & Kuroda, S. (2005). Characterization of electroplated platinum-iridium alloys on the nickel-base single crystal superalloy. Materials Transactions, 46(10), 2176-2179. https://doi.org/10.2320/matertrans.46.2176